Self and morgan jones



@eine me @met @auch EDWARD SNYDEE, QESLA'TINGTOMPENNSYLVANIAASSIGNOR To EIM- sEL'r ,AND MORGAN JONES, or SAME PLAGE Letters Patent No. 76,9151, elated April 21, 1868.

IMPROVEMENT 1N MACHINES ron nounours-'TEE -coBNEE-s ot'sLArE-rEAMEs.

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TO ALL WHOM IT MAY CONGERN: n l

Be it known that I, EDWARD SNYDER, of`-Slatington, in the-county of Lehigh, and State of Pennsylvania, have invented certain new and useful Improvements-in'Machines for Rounding the Corners of Slate-Frames and analogous articles and I dohereby declare that the following is a full and exact description thereof.

My machine' operates by means of a rapidly-revolving cutter, or wheel provided vvith cutting-teeth,`mounted in fixed bearings. The slate,- or other article to be rounded, is first made with right-angled corners, as usual, and each is successively introducedl in a slide, with a corner presented towards the cutter-wheel, and is moved' past the cutting-wheel. Theframe is guided in acurve, sc that the slate is caused to recede from and-to approach the cutting-wheel as it is moved past, and thus producing-exactly the curve required. A spring is introduced, to throw the slide back to its original position-as soon as a corner is finished, and the slide may be turned in the frame, so as to present a new corner,'and thus repeat the operation very rapidly.

.I will preceedrtc describe-in detailvwhat I-consider the best means of carrying out-my invent-,ione

The accompanying drawings form a part of this specification.

Figure 1 is a front view,

Figaro 2 is a plan View, and

Figure 3 is an end view of the entire machine.

Figure 4 represents the cutter and shaft on a larger scale.

Similar letters of reference indicate like parts in all the gures.

'is a rigid framework; B is' an upright shaft, mounted therein, driven by a belt from a steam-engine o1" other convenient power, not represented; and C is a cutter-Wheel, which may be formed in any approved Inan-A ner, and provided with sharp cutters, Aadapted to remove the-Wood presented thereto. A

D is a slide, which may be formed of a piece of hard vboard'or light plank, supported on the sides of the frame, as representedyand provided .with `tivo gauges, Dl DZ, on the upper face. 'These gauges stand at 4right angles to each other, and are adapted to receive a slate of any size, and to present the corner between the gauges to be acted on' by .the cutter.

The edge of the slide D is hcllowed out cach side ofthe point where the corner ofthe slate is held, as indi= cated by da d4. This allows the slide to hc moved up very closely to the cutter-wheel at this point.

al a2 are p ins,iixed in the top of the frame where the slide D is supported; and these pins are lreceived in curved slots d d2. vThe pieces Ai A2, fixed on the framing A, stand in Contact with the upper-'face of the slide D, and conne it against becoming displaced` The cutter-wheel G acts on the othcr'side of the machine, through u. hole in the upright guide A3, to trim and properly finish the straightedges of the slate-frame or other article to betr-cated. This portion of tho mechanism iscommcn tofthcr machines operatedfor this purpose, and need not bel particularly described.

The operation of my machine will be readily understood. The cutter-Wheel() being set in motion at a high velocity, the' slates, with their frames,- are laid successivelyvon the slide-D, with the'two edges against the gauges DI D2, an'ld the slide is moved to the right'by the force' of the hand applied in an obvious manner. .In eifccting this movement, the slide, being guided by the pins a1 a2, `standing in't'he lcurved. slots il cl2, during the early portion ofthe. movement, recedes from the cutting-wheel-O, and, during the 'latter portion of the movement, approaches toward the cutter-wheel C. The curvature of the Aslots cZ d2 is so proportionedto the site cf the. wheel() as to produce, by this motion, exactly the curvature required. The movement of the corner of the slate in this manner past the cutter pres-ents it inl such a manner as to4 just remove a sufficient quantity of the material, and in a right position to round the corner perfectly. As soon as this movement is completed, the' slide D, with its'connectious, returns to its original place by the action of the spring E,.mounted underneath, as represented. The slateis now drawn back on the slide D, and is turnedon'e quarter around, and thrust back into contact with the gauges Dl D2, and again the slide D, with its connections, is moved to the right, as before.

This operation is repeated, turning the slate over, as well as around, when necessary, intorder to present the grain of thewood in the most advantageous manner to the action of the cutter. My machine, by holding the slate in a fixed position upon the slide D, land moving it past the cutter in this manner, allows the cutters te act with more advantage, and with less liability to split orreughen the corners, than any other machine for the purpose known to me. i

I prefer, in practice, to make the gauge D2 overhang a little, so as to press slightly on the upper edge of the slate-frame, and hold it firmly down upon the slide D while under the action of the cutters. What I esteem the preferable modo of constructing this is indicated in the drawings, there lbein a piece of sheet steel or other suitable material screwed down upon the slide D,and bent over, tio form the gauge.

5 Having now fully described my invcntinn, what I claim as new in machines fr' rounding the corners of slates and analogous articles, and desire to secure by Letters Patent, is-as follows:

I claim the curved guides cll'ol2 and pins a a2, or their'equivalent, arranged and operating, relatively to` the cutter C and carrier D, substantially-as and for the purposes herein set `forth.

EDWARD SNYDER Witnesses:

JONAS KERN, BENJAMIN KERN'. 

